support meta info for client and proxy

conf/frpc_full.ini

@@ -64,6 +64,10 @@ tls_enable = true
 # heartbeat_interval = 30
 # heartbeat_timeout = 90
 
+# additional meta info for client
+meta_var1 = 123
+meta_var2 = 234
+
 # 'ssh' is the unique proxy name
 # if user in [common] section is not empty, it will be changed to {user}.{proxy} such as 'your_name.ssh'
 [ssh]
@@ -92,6 +96,9 @@ health_check_timeout_s = 3
 health_check_max_failed = 3
 # every 10 seconds will do a health check
 health_check_interval_s = 10
+# additional meta info for each proxy
+meta_var1 = 123
+meta_var2 = 234
 
 [ssh_random]
 type = tcp

models/config/client_common.go

@@ -115,6 +115,8 @@ type ClientCommonConf struct {
 	// before the connection is terminated, in seconds. It is not recommended
 	// to change this value. By default, this value is 90.
 	HeartBeatTimeout int64 `json:"heartbeat_timeout"`
+	// Client meta info
+	Metas map[string]string `json:"metas"`
 }
 
 // GetDefaultClientConf returns a client configuration with default values.
@@ -144,6 +146,7 @@ func GetDefaultClientConf() ClientCommonConf {
 		TLSEnable:         false,
 		HeartBeatInterval: 30,
 		HeartBeatTimeout:  90,
+		Metas:             make(map[string]string),
 	}
 }
 
@@ -294,6 +297,11 @@ func UnmarshalClientConfFromIni(content string) (cfg ClientCommonConf, err error
 			cfg.HeartBeatInterval = v
 		}
 	}
+	for k, v := range conf.Section("common") {
+		if strings.HasPrefix(k, "meta_") {
+			cfg.Metas[strings.TrimPrefix(k, "meta_")] = v
+		}
+	}
 	return
 }
 

models/config/proxy.go

@@ -130,6 +130,9 @@ type BaseProxyConf struct {
 	// 0 means no limit
 	BandwidthLimit BandwidthQuantity `json:"bandwidth_limit"`
 
+	// meta info for each proxy
+	Metas map[string]string `json:"metas"`
+
 	LocalSvrConf
 	HealthCheckConf
 }
@@ -146,7 +149,8 @@ func (cfg *BaseProxyConf) compare(cmp *BaseProxyConf) bool {
 		cfg.Group != cmp.Group ||
 		cfg.GroupKey != cmp.GroupKey ||
 		cfg.ProxyProtocolVersion != cmp.ProxyProtocolVersion ||
-		cfg.BandwidthLimit.Equal(&cmp.BandwidthLimit) {
+		cfg.BandwidthLimit.Equal(&cmp.BandwidthLimit) ||
+		!reflect.DeepEqual(cfg.Metas, cmp.Metas) {
 		return false
 	}
 	if !cfg.LocalSvrConf.compare(&cmp.LocalSvrConf) {
@@ -165,6 +169,7 @@ func (cfg *BaseProxyConf) UnmarshalFromMsg(pMsg *msg.NewProxy) {
 	cfg.UseCompression = pMsg.UseCompression
 	cfg.Group = pMsg.Group
 	cfg.GroupKey = pMsg.GroupKey
+	cfg.Metas = pMsg.Metas
 }
 
 func (cfg *BaseProxyConf) UnmarshalFromIni(prefix string, name string, section ini.Section) error {
@@ -212,6 +217,12 @@ func (cfg *BaseProxyConf) UnmarshalFromIni(prefix string, name string, section i
 		}
 		cfg.HealthCheckUrl = s + cfg.HealthCheckUrl
 	}
+
+	for k, v := range section {
+		if strings.HasPrefix(k, "meta_") {
+			cfg.Metas[strings.TrimPrefix(k, "meta_")] = v
+		}
+	}
 	return nil
 }
 
@@ -222,6 +233,7 @@ func (cfg *BaseProxyConf) MarshalToMsg(pMsg *msg.NewProxy) {
 	pMsg.UseCompression = cfg.UseCompression
 	pMsg.Group = cfg.Group
 	pMsg.GroupKey = cfg.GroupKey
+	pMsg.Metas = cfg.Metas
 }
 
 func (cfg *BaseProxyConf) checkForCli() (err error) {

models/msg/msg.go

@@ -70,6 +70,7 @@ type Login struct {
 	PrivilegeKey string            `json:"privilege_key"`
 	Timestamp    int64             `json:"timestamp"`
 	RunId        string            `json:"run_id"`
+	Metas        map[string]string `json:"metas"`
 
 	// Some global configures.
 	PoolCount int `json:"pool_count"`
@@ -90,6 +91,7 @@ type NewProxy struct {
 	UseCompression bool              `json:"use_compression"`
 	Group          string            `json:"group"`
 	GroupKey       string            `json:"group_key"`
+	Metas          map[string]string `json:"metas"`
 
 	// tcp and udp only
 	RemotePort int `json:"remote_port"`

models/plugin/http2https.go

@@ -94,7 +94,6 @@ func NewHTTP2HTTPSPlugin(params map[string]string) (Plugin, error) {
 	return p, nil
 }
 
-
 func (p *HTTP2HTTPSPlugin) Handle(conn io.ReadWriteCloser, realConn net.Conn, extraBufToLocal []byte) {
 	wrapConn := frpNet.WrapReadWriteCloserToConn(conn, realConn)
 	p.l.PutConn(wrapConn)
@@ -105,7 +104,7 @@ func (p *HTTP2HTTPSPlugin) Name() string {
 }
 
 func (p *HTTP2HTTPSPlugin) Close() error {
-	if err := p.s.Close();err != nil {
+	if err := p.s.Close(); err != nil {
 		return err
 	}
 	return nil

models/plugin/https2http.go

@@ -126,7 +126,7 @@ func (p *HTTPS2HTTPPlugin) Name() string {
 }
 
 func (p *HTTPS2HTTPPlugin) Close() error {
-	if err := p.s.Close();err != nil {
+	if err := p.s.Close(); err != nil {
 		return err
 	}
 	return nil